The application is unable to accept further updates because the last attempt to persist the state failed. See the event log for more details
Solution:
Sometimes you will get this error, when you configure the search in sharepoint server. Do the below steps, one by one.
1. Go to central admin
2. Go to Operations Tab.
3. Click on "Services on Server" link and Stop the "Office Sharepoint Server Search"
4. Again, start the "Office Sharepoint Server Search".
5. Go to SSP & Search Settings.
6. Here you have to configure again the search settings.
7. Then, It will take few minutes to complete teh operation. (based on the Timer execution).
Thats it...